Cupola-furnace



(No Model.)

J. H. WHITING. GUPOLA FURNACE No. 526,914. Pafnented Oct. 2,1894.

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UNITED STATES "PATENT OFFICE.

' JOHN H. WHITING, on DETROIT, MICHIGAN.

CUPOLA-FURNACE.

SPECIFICATION forming part of Letters Patent No. 526,914, dated October2, 1894. Application filed March 26, 1894. Serial No. 505,092. (Nomodel.)

To all whom it may concern.-

Be it known that 1, JOHN ILWHITING, a citizen of the United States,residing at Detroit, in the county of Wayne and State of Michigan, haveinvented certain new and useful Improvements in Cupola-Furnaces, ofwhich the following is a specification, reference being had therein tothe accompanying drawings.

This invention relates more specifically to a cupola furnace in whichthe tuyeres may be adjusted higher up or lower down, and the object ofmy invention is to devise a construction of cupola in" which this may bedone more conveniently than at present. For'instance, in a stove foundryor a foundry where the iron is running almost continuously it is therule to hold but a small quantity of iron in the cupola and the tuyeresare placed at a comparatively small distance above the bed. In otherwork, as in car wheel foundries, these tuyeres are placed at a greaterdistance, sometimes two feet or more, above the bed in order that thecupola may hold a large quantity of melted iron before tapping. It isalso desirable that in a cupola having a small diameter, in small heats,that the tuyeres be placed lower down than in a larger diameter, and itsometimes happens that purchasers buy a large cupola and put in a doublelining and expect to take out some of this lining as they require toincrease the capacity of cupola duty. For this reason it is desirablethat the tuyeres can be placed low down when the inside of the cupola isto be small, or at a greater height when the inside diameter is to beincreased.

' In some localities where foundries are now using coal it may becomedesirable in the future to use coke. When coal is used, in order toreduce as'much as possible the amount of the fuel consumed to a givenamount of iron, the tuyeres are placed low down, while when coke is usedthey are adjusted at a greater height on account of the decreasedspecific gravity of the fuel. An arrangement therefore which willconveniently allow a vertical adjustment of the tuyeres without thenecessity of chipping holes in the shell (which is the only way itcan beaccomplished at present) constitutes a decided improvement in theconstruction of cupola furnaces.

To this end my invention consists in means for accomplishing this all'asmore fully hereinafter described and shown in the drawings, in which-Figure 1 is a horizontal section through a cupola furnace in the planeof the tuyeres. Fig. 2 is a cross section in line xm. Fig 3 is anoutside view of one of the tuyeres. F 1g. 4 is a similar view to Fig. 2with the linlng and tuyeres omitted.

A represents the bed of the cupola, B the shell, 0 the innerlining, andD the tuyere, all arranged and constructed in the usual manner. Eachtuyere is secured in an opening E in the shell, which opening is cutconsiderably larger, that is of a greater height, than the height of thetuyere. Over this open ng is placed a plate F in which is out an openingG (or tuyere hole) of the proper size to receive the end of the castiron tuyere. On

either side of this opening in the plate are vertical slots H, throughwhich pass suitable bolts I, with suitable tighteningnuts on theoutside, to adj ustably secure the plate F to the outside of the shell.By making this provision in the construction of the cupola, itwill beseen that in setting up a cupola, the tuyeres maybe adjusted to anydesired height within the limit of the opening in the outer shell, andif desired to afterward change the position of the tuyeres, all that isrequired 1s to form new holes in the inner lining. What I claim as myinvention is-- 1. In a cupola furnace, the combination with a permanentouter shell having a vertically elongatedtuyere opening near its base, avertically sliding plate having a relatively smaller opening therein,means on the casing for adjustably securing the plate'in place, and atuyere arranged in line with the opening in the plate, substantially asdescribed.

2. In a cupola furnace, the combination with a permanent outer casinghaving a vertically elongated tuyere opening therein, a verticallysliding plate having a relatively smaller opening therein and verticalelongated slots in its side, bolts on the casing passing through theslots, nuts onthe bolts and a tuyere arranged in line with the openingin the plate, substantially as described.

In testimony whereof I affix my signaturein presence of two witnesses.-JOHN H. WHITING.

Witnesses:

M. B. ODoeHnn'r O. F. BARTHEL.

